When it comes to Game of Thrones prequels, “everything is on the table” at the moment. When asked if one could be a limited series, that was HBO programming president Casey Bloys‘ response – if a great idea would work as a limited series, they’ll make a limited series. Of course, HBO is hoping to make a prequel that’ll last more than a season. Right now, their primary focus is season 7 and 8 of Game of Thrones, but Bloys cleared the air a little on the prequels. He also shed some light on the eighth and final season of the hit series, which is supposedly so large in scope it might take well over a year to produce and may not air until 2019.